./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37139db5f2012b0b7a96ab437e26855d856636bc4064d013c0b416905ff6e54c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:20:05,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:20:05,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:20:05,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:20:05,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:20:05,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:20:05,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:20:05,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:20:05,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:20:05,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:20:05,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:20:05,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:20:05,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:20:05,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:20:05,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:20:05,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:20:05,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:20:05,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:20:05,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:20:05,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:20:05,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:20:05,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:20:05,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:20:05,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:20:05,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:20:05,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:20:05,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:20:05,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:20:05,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:20:05,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:20:05,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:20:05,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:20:05,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:20:05,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:20:05,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:20:05,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:20:05,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:20:05,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:20:05,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:20:05,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:20:05,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:20:05,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:20:05,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:20:05,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:20:05,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:20:05,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:20:05,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:20:05,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:20:05,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:20:05,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:20:05,945 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:20:05,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:20:05,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:20:05,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:20:05,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:20:05,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:20:05,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:20:05,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:20:05,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:20:05,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:20:05,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:20:05,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:20:05,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:20:05,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:20:05,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:20:05,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:20:05,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37139db5f2012b0b7a96ab437e26855d856636bc4064d013c0b416905ff6e54c [2021-12-14 16:20:06,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:20:06,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:20:06,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:20:06,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:20:06,247 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:20:06,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c [2021-12-14 16:20:06,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f60514d/713895e0966445c2882d13679502f10a/FLAGa1015efe6 [2021-12-14 16:20:06,697 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:20:06,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c [2021-12-14 16:20:06,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f60514d/713895e0966445c2882d13679502f10a/FLAGa1015efe6 [2021-12-14 16:20:07,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f60514d/713895e0966445c2882d13679502f10a [2021-12-14 16:20:07,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:20:07,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:20:07,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:20:07,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:20:07,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:20:07,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31422606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07, skipping insertion in model container [2021-12-14 16:20:07,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:20:07,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:20:07,298 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c[911,924] [2021-12-14 16:20:07,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c[8416,8429] [2021-12-14 16:20:07,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:20:07,432 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:20:07,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c[911,924] [2021-12-14 16:20:07,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-1.c[8416,8429] [2021-12-14 16:20:07,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:20:07,509 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:20:07,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07 WrapperNode [2021-12-14 16:20:07,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:20:07,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:20:07,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:20:07,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:20:07,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,567 INFO L137 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 614 [2021-12-14 16:20:07,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:20:07,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:20:07,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:20:07,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:20:07,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:20:07,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:20:07,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:20:07,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:20:07,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (1/1) ... [2021-12-14 16:20:07,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:20:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:20:07,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:20:07,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:20:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:20:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:20:07,676 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:20:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:20:07,676 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:20:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:20:07,676 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:20:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:20:07,676 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:20:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:20:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:20:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:20:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:20:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:20:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:20:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:20:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:20:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:20:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:20:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:20:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:20:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:20:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:20:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:20:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:20:07,679 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:20:07,679 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:20:07,679 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:20:07,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:20:07,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:20:07,679 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:20:07,679 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:20:07,778 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:20:07,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:20:08,111 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-14 16:20:08,111 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-14 16:20:08,142 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:20:08,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:20:08,150 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-14 16:20:08,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:20:08 BoogieIcfgContainer [2021-12-14 16:20:08,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:20:08,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:20:08,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:20:08,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:20:08,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:20:07" (1/3) ... [2021-12-14 16:20:08,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a922eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:20:08, skipping insertion in model container [2021-12-14 16:20:08,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:20:07" (2/3) ... [2021-12-14 16:20:08,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a922eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:20:08, skipping insertion in model container [2021-12-14 16:20:08,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:20:08" (3/3) ... [2021-12-14 16:20:08,157 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.04.cil-1.c [2021-12-14 16:20:08,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:20:08,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:20:08,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:20:08,196 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:20:08,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:20:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 248 states have (on average 1.5846774193548387) internal successors, (393), 254 states have internal predecessors, (393), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-14 16:20:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:20:08,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:08,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:08,244 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 864909050, now seen corresponding path program 1 times [2021-12-14 16:20:08,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472015357] [2021-12-14 16:20:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:08,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:20:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:20:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:20:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:08,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:08,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472015357] [2021-12-14 16:20:08,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472015357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:08,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:08,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:20:08,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847643978] [2021-12-14 16:20:08,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:08,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:20:08,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:20:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:20:08,587 INFO L87 Difference]: Start difference. First operand has 299 states, 248 states have (on average 1.5846774193548387) internal successors, (393), 254 states have internal predecessors, (393), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:09,458 INFO L93 Difference]: Finished difference Result 764 states and 1182 transitions. [2021-12-14 16:20:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:20:09,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:20:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:09,471 INFO L225 Difference]: With dead ends: 764 [2021-12-14 16:20:09,471 INFO L226 Difference]: Without dead ends: 475 [2021-12-14 16:20:09,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:20:09,477 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 1058 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:09,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 1685 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:20:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-14 16:20:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 405. [2021-12-14 16:20:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 333 states have (on average 1.4804804804804805) internal successors, (493), 340 states have internal predecessors, (493), 47 states have call successors, (47), 21 states have call predecessors, (47), 23 states have return successors, (56), 46 states have call predecessors, (56), 45 states have call successors, (56) [2021-12-14 16:20:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 596 transitions. [2021-12-14 16:20:09,538 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 596 transitions. Word has length 65 [2021-12-14 16:20:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:09,539 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 596 transitions. [2021-12-14 16:20:09,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 596 transitions. [2021-12-14 16:20:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:20:09,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:09,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:09,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:20:09,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1163677060, now seen corresponding path program 1 times [2021-12-14 16:20:09,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881925394] [2021-12-14 16:20:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:09,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:20:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:20:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:20:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:09,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:09,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881925394] [2021-12-14 16:20:09,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881925394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:09,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:09,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:20:09,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675742227] [2021-12-14 16:20:09,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:09,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:20:09,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:20:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:20:09,655 INFO L87 Difference]: Start difference. First operand 405 states and 596 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:20:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:11,062 INFO L93 Difference]: Finished difference Result 1498 states and 2175 transitions. [2021-12-14 16:20:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:20:11,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-14 16:20:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:11,075 INFO L225 Difference]: With dead ends: 1498 [2021-12-14 16:20:11,076 INFO L226 Difference]: Without dead ends: 1273 [2021-12-14 16:20:11,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:20:11,085 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 2404 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:11,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 2354 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:20:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-12-14 16:20:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1177. [2021-12-14 16:20:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 951 states have (on average 1.4111461619348056) internal successors, (1342), 971 states have internal predecessors, (1342), 130 states have call successors, (130), 81 states have call predecessors, (130), 94 states have return successors, (161), 127 states have call predecessors, (161), 128 states have call successors, (161) [2021-12-14 16:20:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1633 transitions. [2021-12-14 16:20:11,172 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1633 transitions. Word has length 65 [2021-12-14 16:20:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:11,173 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1633 transitions. [2021-12-14 16:20:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:20:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1633 transitions. [2021-12-14 16:20:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:20:11,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:11,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:11,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:20:11,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1733422016, now seen corresponding path program 1 times [2021-12-14 16:20:11,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618861554] [2021-12-14 16:20:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:11,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:20:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:20:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:11,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618861554] [2021-12-14 16:20:11,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618861554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:11,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:11,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:20:11,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139294590] [2021-12-14 16:20:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:11,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:20:11,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:20:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:20:11,339 INFO L87 Difference]: Start difference. First operand 1177 states and 1633 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:20:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:11,879 INFO L93 Difference]: Finished difference Result 2277 states and 3157 transitions. [2021-12-14 16:20:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:20:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:20:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:11,884 INFO L225 Difference]: With dead ends: 2277 [2021-12-14 16:20:11,884 INFO L226 Difference]: Without dead ends: 1287 [2021-12-14 16:20:11,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:20:11,903 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 345 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:11,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 2025 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:20:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-12-14 16:20:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1217. [2021-12-14 16:20:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 983 states have (on average 1.3957273652085453) internal successors, (1372), 1003 states have internal predecessors, (1372), 130 states have call successors, (130), 81 states have call predecessors, (130), 102 states have return successors, (169), 135 states have call predecessors, (169), 128 states have call successors, (169) [2021-12-14 16:20:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1671 transitions. [2021-12-14 16:20:11,982 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1671 transitions. Word has length 66 [2021-12-14 16:20:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:11,982 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1671 transitions. [2021-12-14 16:20:11,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:20:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1671 transitions. [2021-12-14 16:20:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:20:11,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:11,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:11,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:20:11,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 704062718, now seen corresponding path program 1 times [2021-12-14 16:20:11,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:11,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128118254] [2021-12-14 16:20:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:11,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:20:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:20:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:12,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128118254] [2021-12-14 16:20:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128118254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:12,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:12,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:20:12,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866945231] [2021-12-14 16:20:12,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:12,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:20:12,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:20:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:20:12,067 INFO L87 Difference]: Start difference. First operand 1217 states and 1671 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:20:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:13,711 INFO L93 Difference]: Finished difference Result 3887 states and 5372 transitions. [2021-12-14 16:20:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:20:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-14 16:20:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:13,717 INFO L225 Difference]: With dead ends: 3887 [2021-12-14 16:20:13,717 INFO L226 Difference]: Without dead ends: 1607 [2021-12-14 16:20:13,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:20:13,735 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 2559 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:13,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2577 Valid, 2237 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:20:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-12-14 16:20:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1483. [2021-12-14 16:20:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1173 states have (on average 1.3529411764705883) internal successors, (1587), 1197 states have internal predecessors, (1587), 170 states have call successors, (170), 109 states have call predecessors, (170), 138 states have return successors, (221), 179 states have call predecessors, (221), 168 states have call successors, (221) [2021-12-14 16:20:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1978 transitions. [2021-12-14 16:20:13,839 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1978 transitions. Word has length 66 [2021-12-14 16:20:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:13,839 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 1978 transitions. [2021-12-14 16:20:13,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:20:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1978 transitions. [2021-12-14 16:20:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:20:13,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:13,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:13,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:20:13,841 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:13,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1975322897, now seen corresponding path program 1 times [2021-12-14 16:20:13,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748042747] [2021-12-14 16:20:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:13,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:20:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:20:13,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748042747] [2021-12-14 16:20:13,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748042747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:13,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:13,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:20:13,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502119597] [2021-12-14 16:20:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:13,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:20:13,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:20:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:20:13,984 INFO L87 Difference]: Start difference. First operand 1483 states and 1978 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:20:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:14,568 INFO L93 Difference]: Finished difference Result 2925 states and 3915 transitions. [2021-12-14 16:20:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:20:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-14 16:20:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:14,577 INFO L225 Difference]: With dead ends: 2925 [2021-12-14 16:20:14,577 INFO L226 Difference]: Without dead ends: 1629 [2021-12-14 16:20:14,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:20:14,581 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 340 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:14,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 1962 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:20:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-14 16:20:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1523. [2021-12-14 16:20:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1205 states have (on average 1.3385892116182572) internal successors, (1613), 1229 states have internal predecessors, (1613), 170 states have call successors, (170), 109 states have call predecessors, (170), 146 states have return successors, (229), 187 states have call predecessors, (229), 168 states have call successors, (229) [2021-12-14 16:20:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2012 transitions. [2021-12-14 16:20:14,683 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2012 transitions. Word has length 91 [2021-12-14 16:20:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:14,683 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 2012 transitions. [2021-12-14 16:20:14,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:20:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2012 transitions. [2021-12-14 16:20:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:20:14,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:14,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:20:14,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1531422223, now seen corresponding path program 1 times [2021-12-14 16:20:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331315614] [2021-12-14 16:20:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:14,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:20:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:20:14,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331315614] [2021-12-14 16:20:14,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331315614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:14,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:14,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:20:14,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364674020] [2021-12-14 16:20:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:20:14,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:20:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:20:14,788 INFO L87 Difference]: Start difference. First operand 1523 states and 2012 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:15,367 INFO L93 Difference]: Finished difference Result 3315 states and 4378 transitions. [2021-12-14 16:20:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:20:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:20:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:15,375 INFO L225 Difference]: With dead ends: 3315 [2021-12-14 16:20:15,375 INFO L226 Difference]: Without dead ends: 2053 [2021-12-14 16:20:15,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:20:15,378 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 786 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:15,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1398 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:20:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-12-14 16:20:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1877. [2021-12-14 16:20:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1487 states have (on average 1.3113651647612643) internal successors, (1950), 1512 states have internal predecessors, (1950), 210 states have call successors, (210), 139 states have call predecessors, (210), 178 states have return successors, (270), 228 states have call predecessors, (270), 208 states have call successors, (270) [2021-12-14 16:20:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2430 transitions. [2021-12-14 16:20:15,435 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2430 transitions. Word has length 91 [2021-12-14 16:20:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:15,436 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 2430 transitions. [2021-12-14 16:20:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2430 transitions. [2021-12-14 16:20:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:20:15,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:15,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:15,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:20:15,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1546940941, now seen corresponding path program 1 times [2021-12-14 16:20:15,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:15,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103012837] [2021-12-14 16:20:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:15,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:20:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:20:15,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103012837] [2021-12-14 16:20:15,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103012837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:15,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:15,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:20:15,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791786017] [2021-12-14 16:20:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:15,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:20:15,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:20:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:20:15,552 INFO L87 Difference]: Start difference. First operand 1877 states and 2430 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:16,302 INFO L93 Difference]: Finished difference Result 3404 states and 4394 transitions. [2021-12-14 16:20:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:20:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:20:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:16,310 INFO L225 Difference]: With dead ends: 3404 [2021-12-14 16:20:16,311 INFO L226 Difference]: Without dead ends: 1951 [2021-12-14 16:20:16,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:20:16,314 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 836 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:16,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1540 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:20:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-12-14 16:20:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1656. [2021-12-14 16:20:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1319 states have (on average 1.3131159969673996) internal successors, (1732), 1339 states have internal predecessors, (1732), 182 states have call successors, (182), 120 states have call predecessors, (182), 153 states have return successors, (230), 198 states have call predecessors, (230), 180 states have call successors, (230) [2021-12-14 16:20:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2144 transitions. [2021-12-14 16:20:16,366 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2144 transitions. Word has length 91 [2021-12-14 16:20:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:16,366 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 2144 transitions. [2021-12-14 16:20:16,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2144 transitions. [2021-12-14 16:20:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:20:16,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:16,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:16,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:20:16,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 392221105, now seen corresponding path program 1 times [2021-12-14 16:20:16,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:16,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264674622] [2021-12-14 16:20:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:16,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:20:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:20:16,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:16,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264674622] [2021-12-14 16:20:16,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264674622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:16,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:16,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:16,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189280184] [2021-12-14 16:20:16,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:16,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:16,436 INFO L87 Difference]: Start difference. First operand 1656 states and 2144 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:20:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:16,777 INFO L93 Difference]: Finished difference Result 4808 states and 6256 transitions. [2021-12-14 16:20:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:20:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-14 16:20:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:16,810 INFO L225 Difference]: With dead ends: 4808 [2021-12-14 16:20:16,810 INFO L226 Difference]: Without dead ends: 3339 [2021-12-14 16:20:16,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:20:16,813 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 1137 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:16,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 862 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:20:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-12-14 16:20:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3125. [2021-12-14 16:20:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2468 states have (on average 1.280388978930308) internal successors, (3160), 2517 states have internal predecessors, (3160), 343 states have call successors, (343), 233 states have call predecessors, (343), 312 states have return successors, (513), 377 states have call predecessors, (513), 341 states have call successors, (513) [2021-12-14 16:20:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4016 transitions. [2021-12-14 16:20:16,923 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4016 transitions. Word has length 91 [2021-12-14 16:20:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:16,923 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 4016 transitions. [2021-12-14 16:20:16,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:20:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4016 transitions. [2021-12-14 16:20:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:20:16,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:16,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:16,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:20:16,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:16,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash -665616973, now seen corresponding path program 1 times [2021-12-14 16:20:16,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:16,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700525827] [2021-12-14 16:20:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:16,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:20:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:20:16,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700525827] [2021-12-14 16:20:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700525827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:16,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:16,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:20:16,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076608335] [2021-12-14 16:20:16,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:16,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:20:16,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:20:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:20:16,979 INFO L87 Difference]: Start difference. First operand 3125 states and 4016 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:17,272 INFO L93 Difference]: Finished difference Result 4709 states and 6000 transitions. [2021-12-14 16:20:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:20:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:20:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:17,279 INFO L225 Difference]: With dead ends: 4709 [2021-12-14 16:20:17,279 INFO L226 Difference]: Without dead ends: 1771 [2021-12-14 16:20:17,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:20:17,286 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 458 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:17,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1090 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:20:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-14 16:20:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1656. [2021-12-14 16:20:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1319 states have (on average 1.2850644427596665) internal successors, (1695), 1339 states have internal predecessors, (1695), 182 states have call successors, (182), 120 states have call predecessors, (182), 153 states have return successors, (230), 198 states have call predecessors, (230), 180 states have call successors, (230) [2021-12-14 16:20:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2107 transitions. [2021-12-14 16:20:17,398 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2107 transitions. Word has length 91 [2021-12-14 16:20:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:17,398 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 2107 transitions. [2021-12-14 16:20:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:20:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2107 transitions. [2021-12-14 16:20:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:20:17,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:17,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:20:17,400 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1134197990, now seen corresponding path program 1 times [2021-12-14 16:20:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804807441] [2021-12-14 16:20:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:17,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:20:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:20:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:20:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:20:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:20:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:20:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:20:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:20:17,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804807441] [2021-12-14 16:20:17,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804807441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:17,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:17,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:20:17,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225180745] [2021-12-14 16:20:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:17,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:20:17,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:20:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:20:17,466 INFO L87 Difference]: Start difference. First operand 1656 states and 2107 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:20:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:18,355 INFO L93 Difference]: Finished difference Result 4074 states and 5190 transitions. [2021-12-14 16:20:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:20:18,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-14 16:20:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:18,364 INFO L225 Difference]: With dead ends: 4074 [2021-12-14 16:20:18,364 INFO L226 Difference]: Without dead ends: 2454 [2021-12-14 16:20:18,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-14 16:20:18,368 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 1715 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:18,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 1368 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:20:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-12-14 16:20:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2277. [2021-12-14 16:20:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 1786 states have (on average 1.2525195968645018) internal successors, (2237), 1814 states have internal predecessors, (2237), 259 states have call successors, (259), 168 states have call predecessors, (259), 230 states have return successors, (361), 296 states have call predecessors, (361), 257 states have call successors, (361) [2021-12-14 16:20:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2857 transitions. [2021-12-14 16:20:18,463 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2857 transitions. Word has length 92 [2021-12-14 16:20:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:18,464 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 2857 transitions. [2021-12-14 16:20:18,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:20:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2857 transitions. [2021-12-14 16:20:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:18,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:18,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:18,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:20:18,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1197403432, now seen corresponding path program 1 times [2021-12-14 16:20:18,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816011600] [2021-12-14 16:20:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:18,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:18,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:18,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816011600] [2021-12-14 16:20:18,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816011600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:18,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:18,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:20:18,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335372787] [2021-12-14 16:20:18,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:18,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:20:18,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:20:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:20:18,519 INFO L87 Difference]: Start difference. First operand 2277 states and 2857 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:19,007 INFO L93 Difference]: Finished difference Result 2498 states and 3201 transitions. [2021-12-14 16:20:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:20:19,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:19,015 INFO L225 Difference]: With dead ends: 2498 [2021-12-14 16:20:19,015 INFO L226 Difference]: Without dead ends: 2331 [2021-12-14 16:20:19,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:20:19,016 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 536 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:19,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 832 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:20:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-12-14 16:20:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2277. [2021-12-14 16:20:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 1786 states have (on average 1.2519596864501679) internal successors, (2236), 1814 states have internal predecessors, (2236), 259 states have call successors, (259), 168 states have call predecessors, (259), 230 states have return successors, (361), 296 states have call predecessors, (361), 257 states have call successors, (361) [2021-12-14 16:20:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2856 transitions. [2021-12-14 16:20:19,107 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2856 transitions. Word has length 90 [2021-12-14 16:20:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 2856 transitions. [2021-12-14 16:20:19,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2856 transitions. [2021-12-14 16:20:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:19,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:19,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:19,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:20:19,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 358369770, now seen corresponding path program 1 times [2021-12-14 16:20:19,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:19,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909997835] [2021-12-14 16:20:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:19,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:19,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909997835] [2021-12-14 16:20:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909997835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:19,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:19,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:20:19,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690533949] [2021-12-14 16:20:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:19,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:20:19,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:20:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:20:19,177 INFO L87 Difference]: Start difference. First operand 2277 states and 2856 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:20,038 INFO L93 Difference]: Finished difference Result 2717 states and 3543 transitions. [2021-12-14 16:20:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:20:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:20,046 INFO L225 Difference]: With dead ends: 2717 [2021-12-14 16:20:20,046 INFO L226 Difference]: Without dead ends: 2552 [2021-12-14 16:20:20,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:20:20,048 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 871 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:20,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 1097 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:20:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-12-14 16:20:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2445. [2021-12-14 16:20:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 1934 states have (on average 1.2740434332988624) internal successors, (2464), 1963 states have internal predecessors, (2464), 272 states have call successors, (272), 174 states have call predecessors, (272), 237 states have return successors, (377), 309 states have call predecessors, (377), 270 states have call successors, (377) [2021-12-14 16:20:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3113 transitions. [2021-12-14 16:20:20,156 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3113 transitions. Word has length 90 [2021-12-14 16:20:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:20,157 INFO L470 AbstractCegarLoop]: Abstraction has 2445 states and 3113 transitions. [2021-12-14 16:20:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3113 transitions. [2021-12-14 16:20:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:20,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:20,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:20,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:20:20,159 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash -816289682, now seen corresponding path program 1 times [2021-12-14 16:20:20,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:20,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302371584] [2021-12-14 16:20:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:20,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:20,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:20,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302371584] [2021-12-14 16:20:20,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302371584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:20,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:20,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686529226] [2021-12-14 16:20:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:20,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:20,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:20,227 INFO L87 Difference]: Start difference. First operand 2445 states and 3113 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:21,353 INFO L93 Difference]: Finished difference Result 3110 states and 4145 transitions. [2021-12-14 16:20:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:20:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:21,362 INFO L225 Difference]: With dead ends: 3110 [2021-12-14 16:20:21,362 INFO L226 Difference]: Without dead ends: 2777 [2021-12-14 16:20:21,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:20:21,364 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 868 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:21,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1695 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:20:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-12-14 16:20:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2602. [2021-12-14 16:20:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2071 states have (on average 1.2892322549492998) internal successors, (2670), 2101 states have internal predecessors, (2670), 285 states have call successors, (285), 180 states have call predecessors, (285), 244 states have return successors, (392), 323 states have call predecessors, (392), 283 states have call successors, (392) [2021-12-14 16:20:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3347 transitions. [2021-12-14 16:20:21,453 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3347 transitions. Word has length 90 [2021-12-14 16:20:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:21,454 INFO L470 AbstractCegarLoop]: Abstraction has 2602 states and 3347 transitions. [2021-12-14 16:20:21,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3347 transitions. [2021-12-14 16:20:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:21,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:21,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:21,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:20:21,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash 70933164, now seen corresponding path program 1 times [2021-12-14 16:20:21,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:21,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695186222] [2021-12-14 16:20:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:21,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:21,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:21,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695186222] [2021-12-14 16:20:21,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695186222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:21,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:21,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:21,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303790010] [2021-12-14 16:20:21,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:21,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:21,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:21,542 INFO L87 Difference]: Start difference. First operand 2602 states and 3347 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:22,648 INFO L93 Difference]: Finished difference Result 3688 states and 5027 transitions. [2021-12-14 16:20:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:20:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:22,660 INFO L225 Difference]: With dead ends: 3688 [2021-12-14 16:20:22,660 INFO L226 Difference]: Without dead ends: 3198 [2021-12-14 16:20:22,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:20:22,663 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 865 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:22,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1683 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:20:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-12-14 16:20:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2917. [2021-12-14 16:20:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2346 states have (on average 1.314151747655584) internal successors, (3083), 2378 states have internal predecessors, (3083), 311 states have call successors, (311), 192 states have call predecessors, (311), 258 states have return successors, (426), 351 states have call predecessors, (426), 309 states have call successors, (426) [2021-12-14 16:20:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3820 transitions. [2021-12-14 16:20:22,785 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3820 transitions. Word has length 90 [2021-12-14 16:20:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:22,786 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 3820 transitions. [2021-12-14 16:20:22,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3820 transitions. [2021-12-14 16:20:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:22,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:22,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:22,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:20:22,787 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1840109394, now seen corresponding path program 1 times [2021-12-14 16:20:22,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490930352] [2021-12-14 16:20:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:22,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:22,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:22,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490930352] [2021-12-14 16:20:22,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490930352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:22,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:22,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180654965] [2021-12-14 16:20:22,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:22,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:22,853 INFO L87 Difference]: Start difference. First operand 2917 states and 3820 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:24,260 INFO L93 Difference]: Finished difference Result 4803 states and 6724 transitions. [2021-12-14 16:20:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:20:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:24,292 INFO L225 Difference]: With dead ends: 4803 [2021-12-14 16:20:24,293 INFO L226 Difference]: Without dead ends: 3998 [2021-12-14 16:20:24,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:20:24,298 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 861 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:24,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1679 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:20:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2021-12-14 16:20:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3548. [2021-12-14 16:20:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 2897 states have (on average 1.349326889886089) internal successors, (3909), 2933 states have internal predecessors, (3909), 363 states have call successors, (363), 216 states have call predecessors, (363), 286 states have return successors, (500), 407 states have call predecessors, (500), 361 states have call successors, (500) [2021-12-14 16:20:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 4772 transitions. [2021-12-14 16:20:24,565 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 4772 transitions. Word has length 90 [2021-12-14 16:20:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 4772 transitions. [2021-12-14 16:20:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 4772 transitions. [2021-12-14 16:20:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:24,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:24,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:24,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:20:24,574 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1763208596, now seen corresponding path program 1 times [2021-12-14 16:20:24,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227322779] [2021-12-14 16:20:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:24,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:24,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227322779] [2021-12-14 16:20:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227322779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:24,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:24,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:24,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217373409] [2021-12-14 16:20:24,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:24,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:24,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:24,658 INFO L87 Difference]: Start difference. First operand 3548 states and 4772 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:25,821 INFO L93 Difference]: Finished difference Result 7032 states and 10134 transitions. [2021-12-14 16:20:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:20:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:25,843 INFO L225 Difference]: With dead ends: 7032 [2021-12-14 16:20:25,864 INFO L226 Difference]: Without dead ends: 5596 [2021-12-14 16:20:25,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:20:25,871 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 911 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:25,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1297 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:20:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-12-14 16:20:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 4815. [2021-12-14 16:20:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4004 states have (on average 1.3903596403596403) internal successors, (5567), 4048 states have internal predecessors, (5567), 467 states have call successors, (467), 264 states have call predecessors, (467), 342 states have return successors, (666), 519 states have call predecessors, (666), 465 states have call successors, (666) [2021-12-14 16:20:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 6700 transitions. [2021-12-14 16:20:26,046 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 6700 transitions. Word has length 90 [2021-12-14 16:20:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 6700 transitions. [2021-12-14 16:20:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 6700 transitions. [2021-12-14 16:20:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:26,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:26,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:20:26,049 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1564408046, now seen corresponding path program 1 times [2021-12-14 16:20:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:26,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308986270] [2021-12-14 16:20:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:26,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:26,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:26,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308986270] [2021-12-14 16:20:26,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308986270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:26,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:26,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:26,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631721611] [2021-12-14 16:20:26,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:26,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:26,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:26,120 INFO L87 Difference]: Start difference. First operand 4815 states and 6700 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:27,528 INFO L93 Difference]: Finished difference Result 12322 states and 18250 transitions. [2021-12-14 16:20:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:20:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:27,553 INFO L225 Difference]: With dead ends: 12322 [2021-12-14 16:20:27,553 INFO L226 Difference]: Without dead ends: 9619 [2021-12-14 16:20:27,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:20:27,562 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 989 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:27,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1651 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:20:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2021-12-14 16:20:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 7251. [2021-12-14 16:20:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 6136 states have (on average 1.430084745762712) internal successors, (8775), 6196 states have internal predecessors, (8775), 659 states have call successors, (659), 360 states have call predecessors, (659), 454 states have return successors, (1036), 727 states have call predecessors, (1036), 657 states have call successors, (1036) [2021-12-14 16:20:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 10470 transitions. [2021-12-14 16:20:27,877 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 10470 transitions. Word has length 90 [2021-12-14 16:20:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:27,878 INFO L470 AbstractCegarLoop]: Abstraction has 7251 states and 10470 transitions. [2021-12-14 16:20:27,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 10470 transitions. [2021-12-14 16:20:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:27,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:27,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:27,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:20:27,882 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1071781872, now seen corresponding path program 1 times [2021-12-14 16:20:27,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012806034] [2021-12-14 16:20:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:27,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:27,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:27,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012806034] [2021-12-14 16:20:27,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012806034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:27,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:27,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:27,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16404424] [2021-12-14 16:20:27,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:27,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:27,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:27,948 INFO L87 Difference]: Start difference. First operand 7251 states and 10470 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:29,597 INFO L93 Difference]: Finished difference Result 21288 states and 32222 transitions. [2021-12-14 16:20:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:20:29,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:29,643 INFO L225 Difference]: With dead ends: 21288 [2021-12-14 16:20:29,644 INFO L226 Difference]: Without dead ends: 16149 [2021-12-14 16:20:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:20:29,660 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 877 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:29,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 1694 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:20:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16149 states. [2021-12-14 16:20:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16149 to 12184. [2021-12-14 16:20:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12184 states, 10477 states have (on average 1.46310966879832) internal successors, (15329), 10569 states have internal predecessors, (15329), 1027 states have call successors, (1027), 552 states have call predecessors, (1027), 678 states have return successors, (1922), 1127 states have call predecessors, (1922), 1025 states have call successors, (1922) [2021-12-14 16:20:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12184 states to 12184 states and 18278 transitions. [2021-12-14 16:20:30,266 INFO L78 Accepts]: Start accepts. Automaton has 12184 states and 18278 transitions. Word has length 90 [2021-12-14 16:20:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:30,266 INFO L470 AbstractCegarLoop]: Abstraction has 12184 states and 18278 transitions. [2021-12-14 16:20:30,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12184 states and 18278 transitions. [2021-12-14 16:20:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:30,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:30,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:30,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:20:30,274 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2025722030, now seen corresponding path program 1 times [2021-12-14 16:20:30,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423468741] [2021-12-14 16:20:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:30,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:30,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:30,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423468741] [2021-12-14 16:20:30,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423468741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:30,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:30,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:30,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214912424] [2021-12-14 16:20:30,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:30,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:30,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:30,331 INFO L87 Difference]: Start difference. First operand 12184 states and 18278 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:32,437 INFO L93 Difference]: Finished difference Result 38835 states and 60220 transitions. [2021-12-14 16:20:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:20:32,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:32,534 INFO L225 Difference]: With dead ends: 38835 [2021-12-14 16:20:32,534 INFO L226 Difference]: Without dead ends: 28763 [2021-12-14 16:20:32,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:20:32,637 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 910 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:32,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1645 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:20:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28763 states. [2021-12-14 16:20:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28763 to 22017. [2021-12-14 16:20:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22017 states, 19158 states have (on average 1.485906670842468) internal successors, (28467), 19314 states have internal predecessors, (28467), 1731 states have call successors, (1731), 936 states have call predecessors, (1731), 1126 states have return successors, (4148), 1895 states have call predecessors, (4148), 1729 states have call successors, (4148) [2021-12-14 16:20:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22017 states to 22017 states and 34346 transitions. [2021-12-14 16:20:33,784 INFO L78 Accepts]: Start accepts. Automaton has 22017 states and 34346 transitions. Word has length 90 [2021-12-14 16:20:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 22017 states and 34346 transitions. [2021-12-14 16:20:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 22017 states and 34346 transitions. [2021-12-14 16:20:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:33,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:33,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:20:33,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 809568304, now seen corresponding path program 1 times [2021-12-14 16:20:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675043309] [2021-12-14 16:20:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:33,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:33,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675043309] [2021-12-14 16:20:33,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675043309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:33,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:33,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:33,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465557589] [2021-12-14 16:20:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:33,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:33,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:33,867 INFO L87 Difference]: Start difference. First operand 22017 states and 34346 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:37,037 INFO L93 Difference]: Finished difference Result 72746 states and 116274 transitions. [2021-12-14 16:20:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:20:37,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:37,473 INFO L225 Difference]: With dead ends: 72746 [2021-12-14 16:20:37,487 INFO L226 Difference]: Without dead ends: 52841 [2021-12-14 16:20:37,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:20:37,588 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 870 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1641 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:20:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52841 states. [2021-12-14 16:20:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52841 to 41618. [2021-12-14 16:20:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41618 states, 36519 states have (on average 1.50072564966182) internal successors, (54805), 36803 states have internal predecessors, (54805), 3075 states have call successors, (3075), 1704 states have call predecessors, (3075), 2022 states have return successors, (9994), 3367 states have call predecessors, (9994), 3073 states have call successors, (9994) [2021-12-14 16:20:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41618 states to 41618 states and 67874 transitions. [2021-12-14 16:20:40,026 INFO L78 Accepts]: Start accepts. Automaton has 41618 states and 67874 transitions. Word has length 90 [2021-12-14 16:20:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:40,026 INFO L470 AbstractCegarLoop]: Abstraction has 41618 states and 67874 transitions. [2021-12-14 16:20:40,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 41618 states and 67874 transitions. [2021-12-14 16:20:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:40,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:40,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:40,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:20:40,055 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 77600878, now seen corresponding path program 1 times [2021-12-14 16:20:40,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:40,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186421667] [2021-12-14 16:20:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:40,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:40,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186421667] [2021-12-14 16:20:40,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186421667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:40,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:40,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:40,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574056891] [2021-12-14 16:20:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:40,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:40,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:40,138 INFO L87 Difference]: Start difference. First operand 41618 states and 67874 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:44,688 INFO L93 Difference]: Finished difference Result 110455 states and 176651 transitions. [2021-12-14 16:20:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:20:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:44,913 INFO L225 Difference]: With dead ends: 110455 [2021-12-14 16:20:44,914 INFO L226 Difference]: Without dead ends: 70950 [2021-12-14 16:20:44,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:20:44,998 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 564 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:44,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1482 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:20:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70950 states. [2021-12-14 16:20:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70950 to 42389. [2021-12-14 16:20:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42389 states, 37290 states have (on average 1.4903727540895682) internal successors, (55576), 37574 states have internal predecessors, (55576), 3075 states have call successors, (3075), 1704 states have call predecessors, (3075), 2022 states have return successors, (9994), 3367 states have call predecessors, (9994), 3073 states have call successors, (9994) [2021-12-14 16:20:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42389 states to 42389 states and 68645 transitions. [2021-12-14 16:20:47,323 INFO L78 Accepts]: Start accepts. Automaton has 42389 states and 68645 transitions. Word has length 90 [2021-12-14 16:20:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:20:47,323 INFO L470 AbstractCegarLoop]: Abstraction has 42389 states and 68645 transitions. [2021-12-14 16:20:47,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42389 states and 68645 transitions. [2021-12-14 16:20:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:20:47,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:20:47,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:20:47,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:20:47,347 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:20:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:20:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1338518128, now seen corresponding path program 1 times [2021-12-14 16:20:47,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:20:47,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450716542] [2021-12-14 16:20:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:20:47,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:20:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:20:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:20:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:20:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:20:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:20:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:20:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:20:47,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:20:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450716542] [2021-12-14 16:20:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450716542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:20:47,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:20:47,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:20:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586382442] [2021-12-14 16:20:47,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:20:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:20:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:20:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:20:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:20:47,418 INFO L87 Difference]: Start difference. First operand 42389 states and 68645 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:20:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:20:55,297 INFO L93 Difference]: Finished difference Result 182432 states and 299479 transitions. [2021-12-14 16:20:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:20:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2021-12-14 16:20:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:20:55,797 INFO L225 Difference]: With dead ends: 182432 [2021-12-14 16:20:55,798 INFO L226 Difference]: Without dead ends: 142156 [2021-12-14 16:20:55,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:20:55,927 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 2045 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:20:55,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 1562 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:20:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142156 states. [2021-12-14 16:21:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142156 to 117987. [2021-12-14 16:21:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117987 states, 103678 states have (on average 1.4900846852755647) internal successors, (154489), 104861 states have internal predecessors, (154489), 8683 states have call successors, (8683), 4794 states have call predecessors, (8683), 5624 states have return successors, (28611), 8588 states have call predecessors, (28611), 8681 states have call successors, (28611) [2021-12-14 16:21:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117987 states to 117987 states and 191783 transitions. [2021-12-14 16:21:02,984 INFO L78 Accepts]: Start accepts. Automaton has 117987 states and 191783 transitions. Word has length 90 [2021-12-14 16:21:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:02,984 INFO L470 AbstractCegarLoop]: Abstraction has 117987 states and 191783 transitions. [2021-12-14 16:21:02,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 117987 states and 191783 transitions. [2021-12-14 16:21:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-14 16:21:03,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:03,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:03,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:21:03,166 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 291045078, now seen corresponding path program 1 times [2021-12-14 16:21:03,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:03,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071878507] [2021-12-14 16:21:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:03,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:21:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:21:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:21:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:21:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:21:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:21:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 16:21:03,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071878507] [2021-12-14 16:21:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071878507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253197781] [2021-12-14 16:21:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:03,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:03,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:21:03,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:21:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 16:21:03,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:03,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253197781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:03,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:03,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:21:03,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432907875] [2021-12-14 16:21:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:03,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:03,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:03,880 INFO L87 Difference]: Start difference. First operand 117987 states and 191783 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)